Malicious PDF — malware analysis report

Static analysis result for SHA-256 46381c40d59b23ab…

MALICIOUS

PDF

93.7 KB Created: 2021-04-06 12:02:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: d20977483d6689962e1e61f7718d18f0 SHA-1: d5736f6fd9e22f2a6866c05efd53f2677022f3cc SHA-256: 46381c40d59b23ab3a5fb5b1600ed18eac743acd0363a93018258be9730e805a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable hosting or link farms, indicating a phishing or scam attempt. The document body, though heavily obfuscated, appears to be related to the book title 'Albee who's afraid of Virginia Woolf pdf', likely a lure to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://xajibur.ru/award?keyword=albee+who+s+afraid+of+virginia+woolf+pdf PDF link annotation
    • http://shopbest.online/jozuwuvgqqx.pdfIn PDF document text
    • https://cdn.sqhk.co/zixemoliz/7orhegg/religion_in_god_simulator_apk.pdfIn PDF document text
    • http://usene.xyz/segebibakovuxuvid43b18.pdfIn PDF document text
    • http://zagodutaf.getenjoyment.net/5567254596.pdfIn PDF document text
    • https://cdn.sqhk.co/wajidafix/gfujfhf/98604714275.pdfIn PDF document text
    • https://cdn.sqhk.co/momujolo/dcjfgjp/photo_studio_near_me_for_schengen_visa.pdfIn PDF document text
    • https://cdn.sqhk.co/puxolika/2iifije/go_fish_poke_order_online.pdfIn PDF document text
    • http://itravelimpressions.com/18362844057ggzs4.pdfIn PDF document text
    • https://cdn.sqhk.co/madagijoj/oUjb6ic/53178836749.pdfIn PDF document text
    • http://xuxikurov.mygamesonline.org/on_being_17_bright_and_unable_to_read.pdfIn PDF document text
    • https://cdn.sqhk.co/xutazazo/hh7jdif/hyper_scape_ps4_keyboard_and_mouse.pdfIn PDF document text
    • http://tanolugulutewu.medianewsonline.com/cause_and_effect_essay_sample.pdfIn PDF document text
    • http://org-fruit.space/pink_themed_quiz_questions_and_answersv5bpg.pdfIn PDF document text
    • http://nurokojo.mypressonline.com/definicion_de_afasias.pdfIn PDF document text
    • https://cdn.sqhk.co/pigajifaw/bfgggdA/67753100664.pdfIn PDF document text
    • https://cdn.sqhk.co/likafupat/gh54Zjg/smash_racing_3d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6b7ad7e-cb77-41e0-8446-ae058895618d/alpha-phonics_a_primer_for_beginning_readers.pdfIn PDF document text
    • http://tevaluzax.atwebpages.com/lesumizalikojozoxod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07ac2e7e-6ca2-44a7-a24d-26f0a4744453/8533747544.pdfIn PDF document text
    • http://wugujub.onlinewebshop.net/95720248635.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a166aa58-01b4-40c9-9517-3f0ab046bada/2299692357.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87b04c9b-12fb-4c94-ab0d-b1ba6b6993d6/wendys_cheeseburger_nutrition_information.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012f9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F9D 5584 bytes
SHA-256: 641e20e11d36f085d9a23db48af4c315138e30040e987e0b111b5e157d3c4a82
font_01_sfnt_off000142ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142AE 11164 bytes
SHA-256: ccf93fc8132ef96e3e4716b794c3c4805b61786d37dd5454a21b39cade724bb9

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